We never complained about the Mercedes-Benz C63 AMG‘s power—its 451-hp, 6.2-liter V-8 leaves much of the competition, such as the BMW M3 and the Lexus IS F, comfortably behind. But when you are as spoiled by extreme cars as this writer, a little extra never hurts.

Volker Mornhinweg’s troops at AMG have gotten busy again, and are now offering some factory tuning which can be ordered for European-market C63 AMG models immediately. The so-called Performance Plus Package is tuning in the classic sense, with forged pistons taken directly from the SLS AMG, different connecting rods, and an extremely light crankshaft. Power jumps from 451 to 480 hp, available at an unchanged 6800 rpm. Torque remains at 443 lb-ft at 5000 rpm. The engine redlines at 7200 rpm.

Here’s the benefit: Acceleration from 0 to 62 mph, according to factory specs, improves from 4.5 seconds to 4.4 seconds; 0–125 mph (an important measure in Europe) drops sharply from 15.2 to 13.9 seconds. Top speed, however, remains a governed 155 mph. The limit can be upped to 174 mph, another option on both the standard C63 AMG and on the Performance Plus version. The package also includes a high-performance braking system with the inevitable red calipers, a carbon-fiber trunk lid, and a unique steering wheel with Alcantara inserts. At €7080, or about $10,600, it’s far from cheap.

The Performance Plus Package will be offered in the U.S. as well, although pricing is not confirmed, according to a company spokesman. And the good news is that the elevated maximum speed governor will be included, while European customers still have to pay extra to go beyond 155 mph. The theoretical top speed of the car, in our estimation, would be around 190 mph.